5215511231 has 16 divisors (see below), whose sum is σ = 6271003200. Its totient is φ = 4243518720.

The previous prime is 5215511221. The next prime is 5215511233. The reversal of 5215511231 is 1321155125.

It is not a de Polignac number, because 5215511231 - 2¹⁰ = 5215510207 is a prime.

It is a super-2 number, since 2×5215511231² = 54403114801374270722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 5215511231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5215511233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 234956 + ... + 256193.

It is an arithmetic number, because the mean of its divisors is an integer number (391937700).

Almost surely, 2^5215511231 is an apocalyptic number.

5215511231 is a deficient number, since it is larger than the sum of its proper divisors (1055491969).

5215511231 is a wasteful number, since it uses less digits than its factorization.

5215511231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491234.

The product of its digits is 1500, while the sum is 26.

The square root of 5215511231 is about 72218.4964603944. The cubic root of 5215511231 is about 1734.1991205514.

Adding to 5215511231 its reverse (1321155125), we get a palindrome (6536666356).

The spelling of 5215511231 in words is "five billion, two hundred fifteen million, five hundred eleven thousand, two hundred thirty-one".